1) Of a radioactive element 2) Pertaining to element 92 
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of the palate
• (a.) Of or pertaining to the heavens; celestial; astronomical. • (a.) Pertaining to, resembling, or containing uranium; specifically, designating those compounds in which uranium has a valence relatively higher than in uranous compounds.
of or containing uranium, esp. in the tetravalent state. · containing uranium in a valence state higher than the corresponding uranous compound.